5 year lease...you must be mad!
Thats a very long lease in the current environment but maybe you have a break clause in there?
2-3 year lease would be more usual at the moment and at that the landlord would be grateful to have you.

As regards your requests on paint and kitchenette, they are very modest and to be honest, your not asking enough.

Most potential tenants would be asking for;
-at least 3 or 6 months rent free period
-contribution to fit out costs
-modern, well maintained fixtures and fittings.
-spotlessly clean and well decorated offices

Other things to note;
-is there vat on the lease?
-are the rates paid upto date?
-are there service charges?
and so on...